Liquid-crystal blazed grating with spatially distributed four-level twisted nematic domains

被引：11

作者：

Honma, M ^{[1
]}

Nose, T ^{[1
]}

机构：

[1] Akita Prefectural Univ, Dept Elect & Informat Syst, Honjo 0150055, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2004年 / 43卷 / 7A期

关键词：

liquid crystal; liquid crystal grating; blazed grating; beam steerer; beam deflector; microrubbing;

D O I：

10.1143/JJAP.43.L855

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A liquid crystal (LC) cell with multiple twisted nematic domains is fabricated by rubbing alignment films along different directions and is applied to an LC four-level blazed grating. It is theoretically derived that the four-level stepwise phase profile is achieved under optimum LC molecular orientation conditions. The LC four-level blazed grating is obtained by microrubbing using a tiny stylus with a curvature radius of 25 mum. The electrically controllable diffraction efficiency and unique polarization-splitting properties are revealed; namely, the diffraction efficiency can reach approximately 0.8 and the polarization directions of +/-1st-order diffractions are orthogonal to each other.

引用

页码：L855 / L858

页数：4